It doesn't really matter what the end of the inner barrel looks like. Usually the picture of the end of the barrel is the same image as all the other ones the company sells. So rest assured, if it is made from same metal, the barrels will look the same.

I ordered the guarder 6.02mm tbb from ehobby..should be here tomorrow or Friday. If it works ill be ordering the ratech one..as the garder tbb is made of brass..I got it cause it was relativley cheap($30+shipping)

I ordered the guarder 6.02mm tbb from ehobby..should be here tomorrow or Friday. If it works ill be ordering the ratech one..as the garder tbb is made of brass..I got it cause it was relativley cheap($30+shipping)

Will an RA-tech one made for the WE open bolt GBBR's work? also does that guarder work for you?

No the ratech we ob will NOT work with the LM4. And yes the guarder barrel does work..but only with the mods I did to my hop up unit..but if you just get the guarder barrel hoping to just swap it out with no modification you will get disappointed.